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KE2 Compressor Sequencer
Quick Start Guide
Setpoints
Setpoint
SuCTION PRESSuRE
CuT OuT PRESSuRE
2ND SuCTION
PRESSuRE
TEmP uNITS
SuC PRESS DIFF
REFRIgERANT
RELAy#1
RELAy#2
RELAy#3
RELAy#4
RELAy#5
COmP HP PER RELAy
mAx LOAD
uNITS
SuCTION PRESSuRE
(Also available from the front of
the controller.)
REFRIgERANT
(Also available from the front of
the controller.)
mIN COmP RuN TImE
mIN COmP OFF TImE
mIN COmP SWITCH TImE Min. time between switching compressor on or off
2ND SuCTION
PRESSuRE
(Also available
from the front of the controller.)
CuT OuT PRESSuRE
(Also available from the front of
the controller.)
mAx PumP OuT TImE
Aux TEmP TyPE
TEmP uNITS
mIN SAFETy SuC SH
mAx SAFETy SuC TmP
mAx SAFETy PRESSuRE
© Copyright 2018 KE2 Therm Solutions, Inc., Washington, Missouri 63090
Description
Suction Pressure setpoint to cycle the compressors
When below the cut out pressure, system turns off
When enabled w. digital input (short across terminals),
will control fans to run at this pressure, overriding nor-
mal operation until short removed from digital input
Temperature Units
Suction Pressure Differential
Type of refrigerant being used in the system.
Relay controls the 1st stage
Relay controls the 2nd stage
Relay controls the 3rd stage
Relay controls the 4th stage
Relay controls the 5th stage
* Only one digital compressor Digital Comp ON/OFF requires a solid state relay
labels the HP of each compressor
Maximum circuit concurrent load
Units for heater load input
Target Suction Pressure - Setpoint to cycle the com-
pressors
Type of refrigerant being used in the system.
Min. run time to keep any compressor relay energized 0 to 240 seconds
Minimum off time to keep any compressor relay de-
energized
When enabled w. digital input (short across terminals),
controls fans to run at this pressure, overriding normal
operation until short removed from digital input
When below the cut out pressure, system turns off
Sets time limit to reach cut out pressure
Options for using the auxiliary temperature sensor
Temperature Units (can also be accessed from front of
the controller)
Safety for Minimum Suction Superheat
Safety for Maximum Suction Temperature
Safety for Maximum Pressure - when
exceeded sends Alerts
Range / Options
Min 0 psig
Most refrigerants: 150 psia; R410A: 300 psig
R744: 500 psig
Min 0 psig
Most refrigerants: 150 psia; R410A: 300 psig
R744: 500 psig
Min 0 psig
Most refrigerants: 150 psia; R410A: 300 psig
R744: 500 psig
Fahrenheit, Celsius
0.1 to 5.0 psi
R404A, R507, R407A,R407C, R422A, R422D,
R134A, R22, R717, R438A, R408A, R409A, R407F,
R410A, R744, R448A, R450A, R513A
HG Defr Relay, LLS, Digital Comp*, Fixed Speed,
Unloader for Cmp 2, Unloader for Cmp 3,
Unloader for Cmp 4, Unloader for Cmp 5
HG Defr Relay, LLS, Digital Comp*, Fixed Speed,
Unloader for Cmp 1, Unloader for Cmp 3,
Unloader for Cmp 4, Unloader for Cmp 5
HG Defr Relay, LLS, Digital Comp*, Fixed Speed,
Unloader for Cmp 1, Unloader for Cmp 2,
Unloader for Cmp 4, Unloader for Cmp 5
HG Defr Relay, LLS, Digital Comp*, Fixed Speed,
Unloader for Cmp 1, Unloader for Cmp 2,
Unloader for Cmp 3, Unloader for Cmp 5
HG Defr Relay, LLS, Digital Comp*, Fixed Speed,
Unloader for Cmp 1, Unloader for Cmp 2,
Unloader for Cmp 3, Unloader for Cmp 4
0.1 to 50 HP
6,000,000 Btu
15,000 Amps
Btu/Amps
Min 0 psig
Most refrigerants: 150 psia; R410A: 300 psig
R744: 500 psig
R404A, R507, R407A,R407C, R422A, R422D,
R134A, R22, R717, R438A, R408A, R409A,
R407F, R410A, R744, R448A, R450A, R513A
0 to 240 seconds
0 to 240 seconds
Min 0 psig
Most refrigerants: 150 psia ; R410A: 300 psig
R744: 500 psig
Min 0 psig
Most refrigerants: 150 psia; R410A: 300 psig
R744: 500 psig
0 to 240 minutes
Off (Disabled) /monitor/2nd liquid
temperature for circuit #2
Fahrenheit, Celsius
0 to 50ºF / 0 to 27.8K
5 to 90ºF / -15 to 32ºC
0 to 500 psig
Q.2.43 April 2018
Page 5
Default
250 psig for
R-744, 25 psig
for all else
5 psig
50 psig
Fahrenheit
2.0 psi
404A
Disabled
Disabled
Disabled
Disabled
Disabled
None
0
Amps
250 psig for
R-744, 25 psig
for all else
404A
60 seconds
60 seconds
15 seconds
50 psig
5 psig
2 minutes
Disabled
Fahrenheit
0ºF / 0K
90º F / 32ºC
400 psig
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